Model DT23x-0600
Dual Two-Wire DC I/V Input Transmitters
Acromag, Inc. Tel: 248-295-0880
- 31 -
http://www.acromag.com
- 31 -
https://www.acromag.com
SPECIFICATIONS
Model Numbers
DT236-0600, Dual DC I/V Input
DT237-0600, Dual Med DC V Input
DT238-0600, Dual High DC V Input
Dual Isolated Signal Transmitters
Isolated DC Current/Voltage Inputs
Two-Wire Loop-Powered Outputs
CE Approved
Includes cULus Class I, Div 2,
ATEX/IECEx approvals
Custom calibration to your
specifications can be added as a
separate line item at time of
purchase.
The DT model prefix denotes Dual Transmitter. The 3
rd
digit 2 denotes a 2-wire loop
powered transmitter in the Acromag DT200 Transmitter family. The trailing two
“
3x
”
digits denote different combinations of current/voltage input types (36
denotes a dual combination DC current and low voltage input type, while the 37
denotes a dual medium DC voltage input type, and 38 denotes a dual high-level DC
voltage input type).
The “
-
0600” model
suffix specifies a loop-powered unit with CE
and cULus Class I, Division 2, ATEX/IECEx Zone 2 Approvals. Models can be mounted
on standard 35mm “T” Type DIN rail.
Optional factory calibration to your own specifications is ordered as a separate line
item at time of purchase, and on a per unit basis. This requires the specification of
model, operating mode, input type/range, input filter (none, low, medium, or high),
and scaled input range zero/full-scale values. You can also specify a normal 4-20mA
or reverse 20-4mA acting output.
A standard model without added custom factory calibration is calibrated by default
for dual 4-20mA DC at TB1/TB3-1 (DT236), ±1V DC at TB1/TB3-1 (DT237), and ±15V
DC at TB1/TB3-1 (DT238), with both input channels mapped to a 4.000mA zero and
20.000mA full-scale output. Field reconfiguration/recalibration of any model will
require use of the TTC-SIP configuration kit, ordered separately (see Accessories
section).
Input
Models have two channels of two
separate inputs for current and/or
voltage depending on the model.
Unit has separate input channels
at TB1 and TB3 and each channel
has two signal paths that support
different ranges. On DT236, DC
current is input at TB1/TB3-1, and
DC voltage at TB1/TB3-3. On
DT237, ±1V DC is input at
TB1/TB3-1, and ±10V at TB1/TB3-
3. On the DT238, ±15V DC is input
at TB1/TB3-1, and ±150V is input
at TB1/TB3-3. Signal return for the
channel is TB1/TB3-2.
Input Reference Test Conditions:
DT236 TB1/TB3 input A is 4 to 20mA or input B is
±0.5V, DT237 TB1/TB3 input A is ±1V or input B is ±5V, DT238 TB1/TB3 input A is
±15V or input B is ±150V; Ambient Temperature is 25°C; Loop Power is set to 24V
DC in each loop; and Outputs are 4-20mA and drive
250Ω
Loads.
Input Range:
Each channel has two input paths A & B at TB1 (channel 1) and TB3
(channel 2), each path supporting a different nominal input range. The input A/D
processes input signals differentially. Input sub-ranges have their calibration auto-
extrapolated from the calibration of the nominal native range for the input and may
be subsequently calibrated for greater accuracy. A nominal input range may be
rescaled smaller to drive the outputs.
MODEL
Input A at TB1-1/TB3-1
Input B at TB1-3/TB3-3
DT236
±1mA DC, ±20mA plus sub-ranges,
0-20mA, 4-20mA, 0 to 11.17mA.
Uses a precision 24.9Ω current
shunt to convert current to Vin.
1
±0.5V plus sub-range 0-500mV.
No resistive divider is present
at TB1/TB3-3 and the input
impedance is 15M
minimum.
DT237
±1V plus sub-range 0-1V w/ no
resistive input divider.
±10V & ±5V, 0-10V, 0-5V DC w/
86.6K/1084.6K divider.
DT238
±15V plus sub-range, 0-15V DC w/
28K/527K divider.
±150V & ±75V, 0-150V, 0-75V
DC w/5.36K/1003.36K divider
2
1
Note:
An optional external sensor is required to monitor AC current signals for
driving TB1/TB3-1 input A of the DT236 (see Acromag Model 5020-350). This
toroidal sensor generates 0 to 11.17mA DC to drive the DC current input of this
model with AC input current passing through its primary (see Table 2 of page 33 for
scaling the AC current by number of primary turns).
2
Note:
Per cULus Shock & Fire Safety: +/- 150 VDC Maximum Battery Sources or
+/- 60 VDC Maximum SELV MAINS Sources.